\begin{tabular}{l*{4}{c}} \hline\hline
                &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                &\multicolumn{1}{c}{leakage}&\multicolumn{1}{c}{leakage}&\multicolumn{1}{c}{leakage}&\multicolumn{1}{c}{leakage}\\
\hline
log(total sites)&     1.80&    -1.63&    34.53&    33.42\\
                &   (3.65)&   (5.02)&  (23.86)&  (24.18)\\
fraction of sites treated&   -16.57&    -6.66&    92.87&    93.20\\
                &  (17.06)&  (30.13)&  (98.20)&  (99.97)\\
frac treatment sites with above-median leakage&         &     7.02&         &    18.37\\
                &         &   (9.80)&         &  (21.05)\\
baseline leakage&         &         &    -0.02&    -0.02\\
                &         &         &   (0.06)&   (0.06)\\
Constant        &    11.74&    10.03&  -105.98&  -113.07\\
                &   (4.06)&  (11.80)&  (77.44)&  (72.49)\\
\hline
Zero baseline leakage&        Y&        Y&         &         \\
Above median baseline leakage&         &         &        Y&        Y\\
\hline R\textsuperscript{2}&     0.04&     0.06&     0.20&     0.20\\
Observations    &       16&       15&       18&       18\\
\hline\hline
\end{tabular}
